AirHint found the following cheapest return flights from Zurich (ZRH) to Sofia (SOF) in December 2025 (see full year).

Return flights

01 Dec - 15 Dec	Vueling Airlines
04 Dec - 06 Dec	Air Serbia
07 Dec - 12 Dec	Air Serbia
02 Dec - 08 Dec	AJet
04 Dec - 08 Dec	Air Serbia
07 Dec - 13 Dec	Air Serbia
08 Dec - 12 Dec	Air Serbia
08 Dec - 14 Dec	Air Serbia
10 Dec - 15 Dec	easyJet
11 Dec - 12 Dec	Air Serbia
15 Dec - 08 Jan	easyJet
17 Dec - 08 Jan	easyJet
28 Dec - 06 Jan	Air Serbia
16 Dec - 02 Jan	easyJet
17 Dec - 01 Jan	easyJet
26 Dec - 01 Jan	Air Serbia
17 Dec - 02 Jan	easyJet
25 Dec - 08 Jan	Lufthansa
24 Dec - 07 Jan	LOT
31 Dec - 05 Jan	SWISS

Also check the deals for one-way flights from Zurich to Sofia in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Zurich to Sofia in December from 121€

Return flights